Status of UHDTV broadcasting in Republic of Korea

Transcription

1 ITU-R SG6 WP6C Workshop 24th-March-2014 Status of UHDTV broadcasting in Republic of Korea Sangjin Hahm Senior Research Engineer Technical Research Institute Korean Broadcasting System

2 Content Backgrounds Terrestrial UHDTV broadcasting General Information System information, Encoding, Transmission, Field test 4K content Future plan Satellite UHDTV broadcasting Cable UHDTV broadcasting Conclusion 2

3 Backgrounds in Rep. of Korea Successful termination of terrestrial analog broadcasting in 2012 ATSC, Video : 1920x1080i MPEG-2, Audio : Max 5.1ch AC-3 Requesting a post-hdtv broadcasting service in Terrestrial 2010 ~ 2011 : 3DTV 2012 ~ : UHDTV UHDTV, not only by Satellite TV but also Terrestrial Broadcasting Problems of Terrestrial UHDTV broadcasting Huge amount of video data Narrow and limited frequency bandwidth 3

4 Backgrounds Need new technology and equipment for making 4K video and terrestrial broadcasting 4K camera ~, RED, Sony, Canon. High speed & mass storage or media for 4K video recording SSD or memory based storage.. Transmission DVB-T2, 2008 Video Codec HEVC, 2013, JCT-VC 4

5 Terrestrial UHDTV broadcasting In 2012, 4 major terrestrial broadcasters in Rep. of Korea participate in the project UHDTV Supported by the regulatory body of MSIP(Ministry of Sciences, ICT and Future Planning) and KCC(Korea Communications Commission) 5

6 General Information UHDTV Trial License : Phase I Sept. 1 ~ Dec Just 4 months Licensed by KCC Main Feature of UHDTV Trial World s First Terrestrial 4K 30P Trial On- Air Tx Scheme DVB-T2 256QAM, 6MHz Bandwidth Tx Power : 100W Frequency : 785MHz Codec System HEVC Encoding / MPEG-2 TS 4K 30P Content Production Real Time Decoding & 4K 30P Display UHDTV Trial License : Phase II May. 10 ~ Oct About 5 months Licensed by MSIP Main Feature of UHDTV Trial 4K 60P Trial On-Air Tx Scheme Same System and Tx Power Various System Parameters Codec System HEVC Encoding / MPEG-2 TS 4K 60P Content Production Real Time Decoding & 4K 60P Display 6

7 System Configuration Phase 1 Sept. 1 ~ Dec

8 Encoding Phase 1 Video Codec : HEVC (HM v6.0) Video format : 4K(3840x2160), 4:2:0, 8bits, 30fps Encoder type : non real-time S/W encoder (Usually, it takes over a day to encode a video of one minute long) Encoding settings for 4K-UHD experimental broadcasting Profile : main profile Maximum coding unit size : 64x64 Intra Period : 32 GOP size : 8 Video : HEVC ES Audio : AC3 Mux Bitrate : 30Mbps approx. Rate control : not applied Quantization parameter : manually adjusted (28, 30, 32, 34...) HEVC TS (Transport Stream) 8

9 Transmission Phase 1 DVB-T2 Parameter Note Bandwidth Channel Number Transmission Power 6MHz UHF 66ch (Fc 785Mhz) 100 W Transmission Distance km(line of Sight) Transmitting station <--> Receiving point Valid Data-rate (maximum) Mbps DVB-T2 Parameter 1 FFT Size 32K 2 Pilot Pattern PP7 3 Symbol Mapping 256-QAM 4 Constellation Rotation ON 5 FEC(Forward Error Correction) LDPC 64,800 blocks 6 Time Interleaver Single Type 7 Time Interleaver Length 3 8 Guard Interval 1/128 9 Code Rate 5/6 9

10 Transmission Phase 1 Gwanak Transmission Site/Tx Systems TX Tower Elevation of the Site : 660m Located in the south of Seoul Key digital TV & DMB site for Seoul Area DVB-T2 / RF Power 100W / 4 Dipole / Horizontal Polarization / 3 panels 6.03dBi (60/150/330 ) 100W DVB-T2 (Rohde & Schwarz) DVB-T2 256QAM LDPC 5/6 36.5Mbps 10

11 Reception and Viewing Phase 1 Real-time HEVC Decoder (Government-run R&D project) HDMI 1.4a x 1 (30P) DVI x 2 (30p, 60P) HD-SDI x 4 (30p, 60P) 11

12 Field Test Phase 1 Reception Level[dBm] MER[dB] TS Error Reception In December 2012, we were on going the field test for 4K UHDTV transmission by DVB-T2 5Km away from KBS Gwanak Tx Site No Error Good No Error Good No Error Good No Error Good No Error Good N/A N/A Bad No Error Good N/A Bad N/A N/A Bad No Error Good N/A Bad No Error Good No Error Good No Error Good 15 N/A N/A N/A Bad 12

13 4K contents - KBS Drama The slave hunters 24 episodes, 4K 24p by Red One Drama The Princess Man 9 of 24 episodes, 4K 24p by Red Epic The Slave Hunters The Princess Man Drama Gaksital 4 of 28 episodes, 4K 24p by Red Epic Two short documentary, 4K 30p by Sony F65 Gaksital Jungsun & Naksan 2012~2013. Long term documentary Colors for Desires 4K 60p by Sony F ~. Long term documentary Food Odyssey Colors for Desires Food Odyssey 4K 60p by Sony F55, Red Epic and Canon C500 13

14 System Configuration Phase 2 May. 10 ~ Oct

15 Transmission - Phase 2 DVB-T2 Parameter Note Bandwidth Channel Number Transmission Power Transmission Distance Valid Data-rate (maximum) 6MHz UHF 66ch (Fc 785Mhz) 100 W km(line of Sight) Mbps Same parameter as Phase 1 Test with variable DVB-T2 parameters for 4K 60p Wide Area Field test 15

16 Field Test Phase 2 Field Test and Measurement is ongoing in October 2013 Testing for 4K 60p with both 256QAM and 64QAM Testing around wide area (10 to 52Km) away from the Tx site 16

17 Encoding Phase 2 Video Codec : HEVC (HM v10.0) Video format : 4K(3840x2160), 4:2:0, 8bits, 60fps Encoder type : non real-time S/W encoder (Usually, it takes over a day to encode a video of 10 minute long) Encoder set-up for 4K-UHD experimental broadcasting Profile : main profile Maximum coding unit size : 64x64 IntraPeriod : 64 GOPsize : 16 Bitrate : 25Mbps approx. Rate control Video : HEVC ES Audio : AC3 Mux HEVC TS (Transport Stream) 17

18 30p vs 60p Test for Bit Rate increase Increase 15~40% Bit rate over HD resolution on condition of same QP(video quality) Average 30% increase 18

19 Field Trial, now on Going - Terrestrial Experimental 4K UHDTV Broadcasting Phase Ⅲ in 2014 Upgraded video : 4K 60p 8bits to 4K 60p 10bits Upgraded Power : 5KW SFN test Period : March 24 ~ Dec Establishing standard of organization for terrestrial 4K UHDTV Big Events related to 4K and 8K UHDTV 2014 : Asian Athletic Games in Incheon, Rep. of Korea Live 4K 2015 : Willing to start 4K UHDTV Start time is in talks with the government 2018 : Pyeongchang Winter Olympic Games, Rep. of Korea 8K UHDTV 19

20 4K UHDTV plan Satellite and Cable Satellite (Ka and Ku band) 2013 : Established national standard for satellite broadcasting 2014 : Experimental and Test broadcasting 2015 : Start broadcasting Cable 2013 : Established national standard for cable broadcasting 2014 : Test broadcasting with set-top box built in UHDTV 2015 : Start broadcasting 20

21 4K-UHDTV trial broadcasting - Satellite Satellite based 4K-UHDTV trial broadcasting by ETRI-KT Skylife (Oct. 2012~ Jan. 2013) 4K-UHD video transmission experiment through Ka-band Chollian satellite H.264/AVC S/W NRT Encoding and RT Decoding for 4K-UHD source Chollian Satellite (Ka-band) Tx Ant. 29.9GHz 20.1GHz AV format AV Coding 3840X2160, 30p, YUV4:2:0, 8bits / 5.1channel H.264/AVC, MPEG-4 AAC A/V Source Streaming Server DVB-S2 VCM Modulator Rx Ant. DVB-S2 Tuner & H.264 S/W Decoder Transmission Bitrate DVB-S2, 8PSK ¾ 40Mbps/26MHz UHDTV(84') 21

22 4K-UHDTV trial broadcasting - Cable Cable based 4K-UHDTV trial broadcasting by ETRI - CJ HelloVision (Jan. 2013~) Transmission of max. 70Mbps using Broadcast Channel Bonding over legacy digital cable broadcasting system AV format 3840X2160, 30p, YUV4:2:0, 8bits / 5.1channel Method-1 Method-2 AV Coding Transmission Bitrate AV Coding Transmission Bitrate H.264/AVC, AC-3 ITU-T J.83 Annex B 256QAM with 2 channels bonding 70Mbps HEVC, AC-3 ITU-T J.83 Annex B 256QAM with a channel 40Mbps 22

23 Conclusion Rep. of Korea has a very concrete plan to open UHDTV era for terrestrial, cable and satellite TV Start time of terrestrial 4K UHDTV is in talks with the government We found a possibility of 4K UHDTV broadcasting using terrestrial DTV channels thanks to DVB-T2 system and HEVC Need more test and trials for 4K video encoding with HEVC For immersive UHDTV viewing High resolution (4K, 2012) High Frame rate(60p, 2013) Deep bit depth(10bits, 2014) Wide and exact color (4:2:2, Rec2020, 2015) High Dynamic Range 8K UHDTV 23

24 Thank You. 24